WO2007041944A1 - Appareil de detection de niveau d'acier en fusion utilisant des bobines electromagnetiques - Google Patents

Appareil de detection de niveau d'acier en fusion utilisant des bobines electromagnetiques Download PDF

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Publication number
WO2007041944A1
WO2007041944A1 PCT/CN2006/002630 CN2006002630W WO2007041944A1 WO 2007041944 A1 WO2007041944 A1 WO 2007041944A1 CN 2006002630 W CN2006002630 W CN 2006002630W WO 2007041944 A1 WO2007041944 A1 WO 2007041944A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
coil
molten steel
crystallizer
level detecting
Prior art date
Application number
PCT/CN2006/002630
Other languages
English (en)
Chinese (zh)
Inventor
Hong Jiang
Zhiheng Tian
Original Assignee
Hong Jiang
Zhiheng Tian
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hong Jiang, Zhiheng Tian filed Critical Hong Jiang
Priority to EP06791212.1A priority Critical patent/EP1950537B1/fr
Publication of WO2007041944A1 publication Critical patent/WO2007041944A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/261—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields for discrete levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields

Definitions

  • the present invention generally relates to the field of liquid level measurement, and in particular to a continuous casting machine crystallizer molten steel level detecting device. Background technique
  • the use of electromagnetic coils to detect the molten steel level of the continuous casting machine crystallizer has the advantage of not using a radioactive source.
  • the technology can be divided into two types according to its installation method: one is a vortex type, in which the sensor is installed at the copper nozzle of the crystallizer, as disclosed in DE3432987A1; the second is electromagnetic type, in which the sensor is installed in the crystallizer
  • the copper tube is on top or on the upper flange of the crystallizer. For example, as disclosed in CZ278413B6.
  • a disadvantage of the prior art is that the emission line and the receiving coil in the sensor are spatially separated, bulky, low in sensitivity, and short in measuring range.
  • the existing transmitting coils of some sensors that use the electromagnetic coil to detect the molten steel level of the continuous casting machine mold are arranged coaxially with the receiving coil, in order to reduce the excitation current in the transmitting coil and the background generated in the receiving coil. Signal, both open a certain distance. But this still makes the background signal much larger than the useful signal of the eddy current generated in the molten steel in the molten steel in the receiving coil to the height of the marked liquid level, which limits the sensitivity and range of the measurement (usually at 150mm) Within).
  • the object of the present invention is to provide a continuous casting machine crystallizer molten steel liquid level detecting device, wherein the sensor in the detecting device can be installed at the copper pipe mouth of the crystallizer, or can be installed on the upper flange of the crystallizer or crystallized.
  • the copper tube of the device is placed on top of the copper tube to provide a molten steel liquid level detecting device for a continuous casting machine with a compact structure, high sensitivity and long measuring range.
  • a continuous casting machine crystallizer molten steel liquid level detecting device comprising a sensor, a signal wire and a signal processor, wherein the sensor has a transmitting coil, a receiving coil and a compensating coil,
  • the sensor has a transmitting coil, a receiving coil and a compensating coil
  • the receiving coil within the sensor is perpendicular to the axis of the transmitting coil.
  • the compensation coil within the sensor is coaxial with the transmitting coil.
  • the sensor is mounted at the copper port of the crystallizer.
  • the senor is mounted on the upper flange of the crystallizer.
  • the senor is mounted on top of the copper tube of the crystallizer.
  • the continuous casting machine crystallizer molten steel liquid level detecting device of the invention has the following beneficial effects: (1) The invention has the only one transmitting coil, one receiving coil and one compensating coil in the sensor nested with each other, so that the sensor is compact in structure; (2) The invention makes the receiving coil in the sensor perpendicular to the axis of the transmitting coil, greatly reducing the background signal generated by the exciting current of the transmitting coil in the receiving coil, thereby increasing the number of turns of the receiving coil and improving the liquid level detecting.
  • the present invention makes the compensation coil coaxial with the transmission coil, so that the excitation current in the transmission coil generates a background signal in the compensation coil with a small number of turns can be reduced in a larger number of turns
  • the background signal generated in the coil is received, and the useful signal generated by the eddy current in the molten steel in the receiving coil is substantially retained, thereby improving the detection sensitivity and the measuring range of the liquid level detecting device (for the slab mold measuring range is 300mm), the differential method is used to ensure the stability of the liquid level detecting device.
  • FIG. 1 is a schematic diagram of a sensor in a molten steel liquid level detecting apparatus according to a first embodiment of the present invention, wherein the sensor is installed in a billet crystallizer On the upper flange;
  • Fig. 2 is a schematic view of a sensor in a molten steel level detecting apparatus according to a second embodiment of the present invention, wherein the sensor is installed at a copper nozzle of a slab mold.
  • the continuous casting machine crystallizer molten steel liquid level detecting device of the present invention comprises a sensor, a signal electric wire and a signal processing machine, wherein the sensor has a transmitting coil, a receiving coil and a compensating coil, and the three coils are nested with each other.
  • the structure of the present invention will be described in detail below with reference to Figs. 1 and 2, respectively.
  • FIG. 1 A first embodiment of the present invention is shown in Fig. 1.
  • the cylindrical sensor 101 is mounted on the upper flange 103a of the billet crystallizer 103, and the outer casing 101a of the sensor 101 (partially cut away) has a smaller number of inner circumferences of the compensation coil c1 and the transmitting coil pi coaxially wound, which is two lines.
  • the geometrical condition of the coupling coefficient between the electromagnetic mutual induction between the ⁇ is large.
  • the receiving coils si having a larger number of turns are set at the end of the coaxial emission line ⁇ pi and the compensation coil cl close to the copper tube 103b, and the three coils form a nested layout.
  • the axis of the receiving coil si and the transmitting coil pi are perpendicular to each other, which is a geometric arrangement in which the electromagnetic mutual inductive coupling coefficient between the two coils is small.
  • This layout makes the electromagnetic mutual inductive coupling coefficient between the transmitting coil pi and the receiving coil si much smaller than the transmitting line. Since the coupling coefficient between the circle pi and the compensation coil c1 is different by several hundred times, the signal of the compensation coil cl having a small number of turns can be differentially processed with the signal of the receiving coil si having a larger number of turns to cancel the transmitting coil pi.
  • the background signal generated in the coil si is received to improve the stability of the detecting device without reducing the sensitivity of the receiving coil to detect the molten steel level 104.
  • the axis of the receiving coil si is taken to be the most sensitive to the eddy current in the molten steel, perpendicular to the horizontal orientation of the inner surface of the copper tube 103b on the side of the sensor 101, and the axis of the compensation coil cl is taken in a sensitive vertical direction. It is advantageous to maximize the sensitivity of the receiving coil si to the liquid level detection in the differential signals of the two coils.
  • the sensor 101 is connected to a signal processor (not shown) via a cable 102.
  • the signal processor supplies an alternating current to the transmitting coil pi of the sensor 101 and processes the differential signal of the receiving coil si and the compensating coil cl, giving the height value of the molten steel level 104 in the continuous casting machine crystallizer 103 and providing the retained molten steel.
  • the control signal of the liquid level 104 is stable.
  • a second embodiment of the invention is shown in Figure 2.
  • the cylindrical sensor 201 is mounted at the copper nozzle of the slab crystallizer 203, and the compensation coil c2 with a small number of turns in the outer casing 201a (partially cut away) of the sensor 201 is coaxially wound with the transmitting coil p2, and the number of turns is large.
  • the receiving coil s2 (partially split) is placed outside the coaxial transmitting coil p2 and the compensating coil c2, and the three coils form a nested layout.
  • the receiving coil s2 is concentric with the transmitting coil p2 and its axis is perpendicular to each other, which is the orientation arrangement in which the electromagnetic mutual inductive coupling coefficient between the two coils is the smallest.
  • the axis of the receiving wire ⁇ s2 is taken from the orientation of the molten steel surface 204 which is most sensitive to the eddy current in the molten steel under such installation conditions, and the axis of the compensation coil c2 is taken in a sensitive manner parallel to the orientation of the molten steel surface 204.
  • the layout minimizes the sensitivity of the receiving coil s2 to the detection of the molten steel level 204 while canceling the background signal in the receiving coil s2 with a larger number of turns than the background signal of the compensating coil c2 having a smaller number of turns.
  • Sensor 201 is coupled to a signal processor (not shown) via cable 202.
  • the signal processor supplies an alternating current to the transmitting coil p2 of the sensor 201 and processes the differential signal of the receiving coil s2 and the compensation line ⁇ c2, giving the height value of the molten steel level 204 in the continuous casting machine crystallizer 203 and providing a hold
  • the molten steel level 204 stabilizes the control signal.
  • the continuous casting machine crystallizer molten steel level detecting device of the present invention comprises a sensor, a signal cable and a signal processor, wherein the sensor has a transmitting coil, a receiving coil and a compensating coil, and the three coils are nested with each other.
  • the sensor of the present invention can be mounted either on the copper port of the crystallizer, on the upper flange of the crystallizer, or on the top of the copper tube of the crystallizer.
  • the liquid level detecting device of the invention has the advantages of compact structure, high sensitivity and long measuring range, and can be used for the detection and control of the molten steel level of the slab and the billet crystallizer.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Continuous Casting (AREA)

Abstract

La présente invention a trait à un appareil de détection de niveau d'acier en fusion prévu dans un dispositif de cristallisation d'une machine de coulée comportant un capteur (101), des câbles d'interface (102) et un processeur de signaux. Le capteur (101) contient une bobine de transmission (p1), une bobine de réception (s1) et une bobine de compensation (c1) qui sont incorporées les unes dans les autres. Le capteur (101) peut être installé au niveau de la buse d'un conduit en cuivre du dispositif de cristallisation (103), ou installé sur la bride supérieure (103a) du dispositif de cristallisation (103), ou installé sur la buse du conduit en cuivre du dispositif de cristallisation (103).
PCT/CN2006/002630 2005-10-10 2006-10-08 Appareil de detection de niveau d'acier en fusion utilisant des bobines electromagnetiques WO2007041944A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06791212.1A EP1950537B1 (fr) 2005-10-10 2006-10-08 Appareil de detection de niveau d'acier en fusion utilisant des bobines electromagnetiques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510113914.X 2005-10-10
CNB200510113914XA CN100535613C (zh) 2005-10-10 2005-10-10 利用电磁线圈的钢水液位检测装置

Publications (1)

Publication Number Publication Date
WO2007041944A1 true WO2007041944A1 (fr) 2007-04-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/002630 WO2007041944A1 (fr) 2005-10-10 2006-10-08 Appareil de detection de niveau d'acier en fusion utilisant des bobines electromagnetiques

Country Status (5)

Country Link
EP (1) EP1950537B1 (fr)
KR (1) KR20080089330A (fr)
CN (1) CN100535613C (fr)
RU (1) RU2420716C2 (fr)
WO (1) WO2007041944A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912417B (zh) * 2012-11-14 2016-03-30 田志恒 多晶硅铸锭炉固液界面检测装置
CN110223830B (zh) * 2019-06-19 2020-10-16 武汉钢铁有限公司 一种用于嵌入式钢水液位传感器感应线圈的骨架结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04309445A (ja) * 1991-04-05 1992-11-02 Sumitomo Metal Ind Ltd 連続鋳造用鋳型の溶鋼レベル測定方法
CN2318619Y (zh) * 1998-02-12 1999-05-12 姜虹 涡流式金属表面位置检测装置
JPH11248517A (ja) * 1998-03-03 1999-09-17 Nippon Steel Corp 湯面レベル検出器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670801A (en) * 1970-01-16 1972-06-20 Borg Warner Continuous casting mold level control
SE420649B (sv) * 1976-05-20 1981-10-19 Atomenergi Ab Anordning for elektromagnetisk metning vid hog temeratur av atmindtone en av storheterna niva, avstand och hastighet i samband med i en behallare, kanal eller liknande innehallet flytande ledande material med mycket ...
FR2352288A1 (fr) * 1976-05-20 1977-12-16 Atomenergi Ab Dispositif comportant une bobine d'emission et une bobine de reception pour mesures electromagnetiques en presence d'un materiau conducteur liquide
LU80410A1 (de) * 1978-10-25 1980-05-07 Arbed Verfahren zur messung des fuellstandes von metallen in gefaessen,insbesondere in stranggiesskokillen
JPS6057217A (ja) * 1983-09-09 1985-04-03 Nippon Kokan Kk <Nkk> 渦流式モ−ルド湯面計
DE3722795A1 (de) * 1987-07-10 1989-01-19 Amepa Vorrichtung zum detektieren von in einem fluss einer metallschmelze mitfliessender schlacke
IT1222337B (it) * 1987-10-21 1990-09-05 Ceda Costruzioni Elettromeccan Dispositivo per la misura del livello di metallo liquido in un cristallizzatore per lingottiera per colata continua
EP0518635B1 (fr) * 1991-06-11 2003-05-21 Newt Holdings Limited Sonde

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04309445A (ja) * 1991-04-05 1992-11-02 Sumitomo Metal Ind Ltd 連続鋳造用鋳型の溶鋼レベル測定方法
CN2318619Y (zh) * 1998-02-12 1999-05-12 姜虹 涡流式金属表面位置检测装置
JPH11248517A (ja) * 1998-03-03 1999-09-17 Nippon Steel Corp 湯面レベル検出器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1950537A4 *

Also Published As

Publication number Publication date
EP1950537B1 (fr) 2017-09-20
EP1950537A1 (fr) 2008-07-30
KR20080089330A (ko) 2008-10-06
RU2420716C2 (ru) 2011-06-10
CN100535613C (zh) 2009-09-02
CN1873382A (zh) 2006-12-06
EP1950537A4 (fr) 2008-12-10
RU2008118092A (ru) 2009-11-20

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